A new photobase generator containing oxime‐urethane group and its application

Photochemical base formation from oxime‐urethane derivatives was observed via pH changes, GC and HPLC analysis, and laser flash photolysis study. Photolysis of these derivatives results in the formation of amines which induce cross‐linking of poly(glycidyl methacrylate) (PGMA) upon heating. Photocross‐linking reaction of the copolymers, containing epoxy and oxime‐urethane groups, were studied by measuring the insoluble fraction of copolymer films under various reaction conditions. Thermal cross‐linking reaction of the copolymer was catalysed by the photogenerated pendant amines. The copolymer containing oxime‐urethane groups which photogenerate aromatic amines can be utilized as an image recording material.